Raypak 750 - Manual (Page 59)

SECTION O: ADB INITIAL START-UP
1.0 TOOLS NEEDED
• One 8-0-8 , 16” scale manometer (or larger)
• Three 4-0-4, 8” scale manometers (or larger)
• “T” fitting
• 7/16” and 1/2" open end wrenches
• Small and large flat-head screwdrivers
• Volt meter
• Amp probe
• Elec. Dual reading thermometer with strap on sensors
• 3/16” Allen wrench
• Remote switch with 12" minimum lead wires (“Monkey” switch)
• Combustion analyzer
2.0 PREPARATION FOR START-UP
WARNING: DO NOT TURN ON GAS AT THIS TIME
2.1 Check Power Supply
With volt meter at incoming power check voltage between:
Hot - Common
( approx 120 VAC)
Hot - Ground ( approx 120 VAC)
Common - Ground (< 1 VAC)
If Common - Ground is > 1 VAC - STOP: Contact electrician to correct ground failure. Warning: Failure to do this
may burn out 120V-24V transformer, or may cause other safety control damage or failure.
2.2 Attach Manometers to Measure Pressures (See Figure: O-1)
• Attach 16" scale manometer to the first main gas shut-off valve pressure tapping, Location (1)
• Attach one 8" scale manometer to the outlet side of the second main gas shut-off valve pressure tapping, Location
(2).
• Attach one 8" scale manometer to the outlet side of pilot gas valve pressure tapping, Location (3).
• Attach one 8" manometer to "T" fitting, air pressure switch, and aluminum tubing, Location (4).
Turn Off Main Gas Valve;
Turn Off Pilot Gas Valve;
Reset Low Gas Pressure Cut-off Switch;
2.3 Bleed Air from Gas Line
CAUTION: Make sure there is no ignition source in the boiler room
• With power off, slightly open union outside the cabinet to bleed air.
• Close union when you smell gas.
• Wait minimum 5 minutes to clear the gas out of the boiler room before continuing.
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